seamless and welded steel pipe external coating

seamless and welded steel pipe external coating

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Loading Port:: China Main Port

Payment Terms:: TT OR LC

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Specifications

water pipeline inner-layer tape
1 Butyl rubber as adhesive
2. SGS test report and DVGW certificate
3. corrosion protection

water pipeline inner-layer tape

State-of-the-Art Pipeline Protection for All Climates & Environments

System description:

WATER PIPELINE Inner -layer tape also be called pipe wrap anti-corrosion tape, polyethylene wrap tape.

water pipeline Inner-layer tapeT100 is engineered to assure a high bond to the primed pipe surface with excellent conformability characteristics, aggressive adhesive for corrosion protection and repair of main line coatings.

Inner-layer tapeT100 series is cold applied tape coating system for corrosion protection of Oil, Gas, Petrochemical, and Waste Waterburied pipeline, pipe can be buried, also can be underground ,overhead ,onshore and offshore .

Structure of water pipeline inner wrap tape
The specification of the tape consists of two layers, adhesive layer and film backing
Adhesive: butyl rubber
Film backing: Special blend of stabilized polyethylene

Features & Benefits

Provides a permanent bond to the primed steel pipes surface and provides protection against chemical electrolytic corrosion for underground pipelines.
long term corrosion protection
Worldwide reference lists. Established in-ground history
High chemical resistance under service temperature.
Outstanding electric property and permanent adhesion.
Cold applied, No release liner. Makes installation fast and easy.
Complies with EN-DIN 30672 and AWWAC-214 international standards and also ASTM standards.
Be used for water pipeline corrosion protection

System Properties

Type	T138	T 150		T165	T180	T 250	T265	T280
Thickness	15mil 0.38mm	20mil 0.508mm		25mil 0.635mm	30mil 0.762mm	20mil 0.508mm	25mil 0.635mm	30mil 0.762mm
Backing	9mil 0.229mm	9mil 0.241mm		10mil 0.25mm	10mil 0.25mm	15mil 0.38mm	20mil 0.508mm	25mil 0635mm
Adhesive	6mil 0.152mm	11mil 0.279mm		15mil 0.381mm	20mil 0.508mm	5mil 0.127mm	5mil 0.127mm	5mil 0.127mm
When used for ductile iron pipes inner layer 980-20 or 980-25 and outer layer 955-20 or 955-25 are recommended.
Elongation	³300%					³400%
Tensile Strength	55 N/cm					70 N/cm
Color	Black					White
Peel Adhesion to Primed Pipe			33 N/cm
Dielectric Strength			30 KV
Dielectric Breakdown			26 KV/mm
Cathodic Disbandment			0.24 in radius 6.4 mm
Water Vapor Transmission Rate			< 0.1%
Volume Resistivity			2.5 x 10¹⁵ ohm.cm
Impact resistance			5.5Nm
Penetration Resistance			<15%
Performance			AWWA C-209,ASTM D 1000,EN 12068

Order information

Length	100ft(30 M),200ft(60 M),400ft(120 M),800ft(240 M)
Width	2’’(50mm),4’’(100mm),6’’(150mm),17’(450mm),32’’(800mm)

Q: How can the immersed pipe pile put steel cage into the steel pipe? Which expert to answer?: Pile: refers to the use of hammer piling method and pile vibration method, steel casing with valve type pile tip or precast reinforced concrete pile boots into the soil, then pouring concrete (or first in the tube into the cage), while hammering or vibration of a pile side pull tube. The former is called hammer sinking pipe cast-in-place pile, and the latter is called vibrating sinking pipe cast-in-place pile.

Q: How are steel pipes protected against mechanical damage during transportation?: Steel pipes are protected against mechanical damage during transportation through various methods such as using protective coatings, wrapping them with foam or other cushioning materials, securing them with straps or bands, and using appropriate packaging techniques to minimize impact and vibration.

Q: How do you calculate the pipe thermal expansion for steel pipes?: In order to calculate the thermal expansion of steel pipes, one must take into account the material's coefficient of thermal expansion (CTE), the temperature fluctuation, and the pipe's length. The CTE represents the extent to which a material expands or contracts in response to temperature changes. For steel, the average CTE is typically approximately 12 x 10^-6 per degree Fahrenheit (or 6.5 x 10^-6 per degree Celsius). However, this value may vary depending on the specific grade of steel. Subsequently, the temperature change that the pipe will encounter must be determined. This can be the discrepancy between the operating temperature and the ambient temperature, or the temperature variation caused by the fluid or gas flowing through the pipe. Finally, the thermal expansion can be calculated using the following formula: Thermal Expansion = CTE x Length x Temperature Change Where: - CTE signifies the coefficient of thermal expansion - Length denotes the pipe's length - Temperature Change represents the temperature difference For instance, if a steel pipe has a length of 10 meters (32.8 feet) and experiences a temperature change of 100 degrees Celsius (180 degrees Fahrenheit), assuming a CTE of 12 x 10^-6 per degree Celsius, the thermal expansion would amount to: Thermal Expansion = 12 x 10^-6 x 10 x 100 = 0.012 meters (or 12 millimeters) This means that the pipe would expand by 12 millimeters due to the temperature alteration. It is important to note that this calculation provides an approximation of the thermal expansion. However, other factors such as pipe supports, restraints, and the specific application should also be taken into consideration to ensure the proper design and installation of the steel pipe system.

Q: What are the safety considerations when working with steel pipes?: There are several crucial safety considerations to bear in mind when working with steel pipes. To begin with, it is imperative to wear the appropriate personal protective equipment (PPE). This includes safety glasses or goggles to shield the eyes from debris or sparks, gloves to protect the hands from sharp edges or hot surfaces, and steel-toed boots to safeguard the feet from falling objects or heavy equipment. Additionally, it is advisable to wear a hard hat to shield the head from potential falling objects or hazards overhead. Moreover, one must be mindful of the weight and size of the steel pipes. Handling heavy pipes can strain the back and muscles, so it is essential to utilize proper lifting techniques and seek assistance when necessary. The use of lifting equipment, such as cranes or forklifts, can also help prevent injuries associated with heavy lifting. Another safety consideration is the risk of cuts or punctures. Steel pipes may have sharp edges or burrs, so it is important to handle them with care and wear suitable gloves to minimize the risk of injury. It is also recommended to inspect pipes for any defects or sharp edges before working with them. Furthermore, working with steel pipes may involve welding or cutting, which can generate sparks, heat, and fumes. It is vital to work in a well-ventilated area or employ proper ventilation equipment to ensure the elimination of harmful gases or fumes. Fire safety precautions, such as having fire extinguishers nearby and adhering to proper procedures for hot work, should also be taken. Lastly, one must be aware of potential hazards associated with working at heights or in confined spaces. When working on elevated platforms or scaffolding, fall protection measures, like safety harnesses or guardrails, should be in place. In confined spaces, proper ventilation and monitoring for hazardous gases are essential to prevent asphyxiation or exposure to toxic substances. By adhering to these safety considerations and following proper procedures, the risk of accidents or injuries when working with steel pipes can be significantly reduced.

Q: What are the common applications of steel pipes in construction?: Steel pipes are commonly used in construction for various applications such as structural support, plumbing, water distribution, gas transportation, and HVAC systems. They provide strength, durability, and resistance to corrosion, making them an ideal choice for these purposes.

Q: Can steel pipes be used for the construction of railway tracks?: No, steel pipes cannot be used for the construction of railway tracks. Railway tracks are typically made of steel rails that are specifically designed and manufactured for this purpose. Steel pipes lack the necessary shape, strength, and dimensions required for supporting heavy loads and facilitating the smooth movement of trains.

Q: How are steel pipes used in the construction of high-rise buildings?: Steel pipes are commonly used in the construction of high-rise buildings for various purposes, such as structural support, plumbing, and fire protection systems. They provide strength and durability to the building's framework, allowing it to withstand heavy loads and extreme weather conditions. Steel pipes also play a crucial role in carrying water, sewage, and other utilities throughout the building, ensuring efficient functionality. Additionally, they are utilized in the installation of fire sprinkler systems, enhancing the safety measures of the high-rise structure.

Q: What is the importance of corrosion resistance in steel pipes?: The importance of corrosion resistance in steel pipes is crucial as it helps to extend the lifespan of the pipes and maintain their structural integrity. Corrosion can weaken the pipes, leading to leaks, breakages, and ultimately, costly repairs or replacements. By preventing or minimizing corrosion, steel pipes can effectively transport fluids or gases, ensuring safety, efficiency, and longevity in various industries such as oil and gas, water supply, and construction.

Q: Can steel pipes be coated for aesthetic purposes?: Yes, steel pipes can be coated for aesthetic purposes. Coatings such as paint, powder coating, or galvanizing can be applied to steel pipes to enhance their visual appearance and protect them from corrosion. These coatings can provide a variety of colors and finishes to suit different aesthetic requirements.

Q: How are steel pipes used in the manufacturing of boilers?: Due to their strength, durability, and heat-resistant properties, steel pipes are essential components in the manufacturing of boilers. Boilers are utilized in various industrial and commercial applications to generate steam or heat water. The construction of boiler tubes is where steel pipes are primarily employed, as they function as the main heat transfer medium. Considering the high temperatures and pressure that these tubes are subjected to, it is crucial to use a material that can withstand such extreme conditions. Steel, with its excellent mechanical properties and corrosion resistance, is the ideal choice for this purpose. To create the boiler tubes, the manufacturing process involves shaping and sizing the steel pipes accordingly. These tubes are then connected to form a network of channels through which hot gases or water can flow. Depending on the boiler design requirements, the steel pipes utilized in this process are often seamless or welded. For the safety and efficiency of the system, the steel pipes used in boilers must meet stringent quality standards. They are subjected to tests to ensure their ability to withstand high pressure, temperature, and corrosion. Furthermore, inspections and tests such as ultrasonic testing and radiographic examination are conducted to identify any defects or flaws that might compromise the performance of the boiler. In conclusion, steel pipes play a critical role in the manufacturing of boilers by serving as the primary material for boiler tubes. Their strength, durability, and heat-resistant properties make them suitable for enduring high temperatures and pressure. These pipes undergo rigorous testing to guarantee their quality and reliability in creating efficient and safe boiler systems.

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